Improvement in receiving-magnets



` duce, by means of an electro-magnet, a greater therewith or otherwise, so that the armature magnetic on a current of UNITED STATES PATENT OFFICE.

S. F. ,VAN CHOATE, OF NEV YORK, N. Y.

i iMPnovEMENT iN- -REcEiviNG-MAGNETS.

Specification forming partot -Letters Patent No. 110,133.,y dated Scpfcmbe1'29, 1863.

To all whom t may concern.' Y

Be` it known that I, S. 'F..VAN GHOATE, oi the city, county, 'and State of New York, have invented certain new and useful Improvements in Electro-Magnets; and I hereby declare that the following is a full, clear, and exa'ctdescription ofthe same. y The object of this my invention is to prolmagnetic eifect from a given battery-power than' could heretofore be obtained; and invention consists, rst, in locating the armature or vibrator of an electro-magnet, together with the core,within:the coils and concentrically -shall'bc magnetized at the same time the core is magnetized; second, in combining with an armature located within the cylinder of 'the spool or coils a horseshoe-magnet, so shaped that both of its lends are within the cylinder of the spool or in line of its axis.

Electro-magnets areconstructed onjthewel1 known principle that an insulated wire coiled about a piece of soft ironis rendered suddenly electricity being sent through the coil, and that on cessation of th current circulating around it the iron as suddenlyloses this power. Usually they are made of a piece of iron ot' the shape ot' a horseshoe having a quantity of line silk-covered wire wound around it, the ends ot' such wire being joined to the wire onl the line, so that when a current is sent through this main wire it must pass around the coils upon the soft iron. The iron, then becoming magnetic, would attract a small armature or piece otiron or steel placed opposite the ends of the horseshoe, and the motion of the vibrator is used as an indicator or operating a mechanism, as is well underst0od,for telegraphing and other purposes.

In order to produce practical effects a large v quantity of wire is required, which. creates resistance proportionate to its length, whereby the battery-power is greatly reduced.

I have imagined a new arrangement or coinbination of apparatus, whereby, with a less quantity of wire, and consequently with less resistance, I am enabled to produce magnetic effects much greater with a-battery of given power.

To enable others to make and use my invention, I shall new preceed to describe the same,

- will he instantl zeicrence being had tothe accom pan yin g draw- Figures 1 and 2 are, respectively, front and sideselevations ot' an electro-magnet construct-V ed-in accordance with my invention. Figs. 3 and l arcsectional elevations of the saine on lines a l e-a.. i Fig.5 is a plan view of the saine;

upon a spool,avibrator,aud a device forregulatin g the tension and vibration.

The horseshoe-magnet A is composed of two angular pieces of soft iron', united by a screwv at j, the ends s n being made to face each other. The horseshoe is secured to the base-plate by a screw passing through it and up into the branch c of the angular piece A. By this arrangement the two ends or end branches are vertical in relation to the base-plate.-

Before the two pieces are united at their juncture at j, I insert upon the lower upright branch a spool made of bone-rubber, around whichtis wound a silk-covered wire. The coil is protected bya bone-rubber sleeve or cap G.

Within the cylindricalbore of the spool there is the armature or vibrator C, hungin adjustable screw-journals h upon an axle or spindle d.

To this spindleis fixed an arm, g, whose end is connected,bya spring-wire, shaft o erate'd by a knob,k. Bythis shaft the springe'n'sionwoh the vibratory bar is regulated, so that on cessation of the inagnetizing 'currents the vibrator may be drawn back from the core.

A spring, m, inserted between the knob and the bearing ot' t-heshaft, creates sufiicient fric tion to make the adjustment of tension permanent. 'lwo screws, respectively in the upper v brauch ot the core or horseshoe-in agnet and in a bracket, regulate the play ot the vibrator.

The operation, it will be understood, is simiA lar to apparatus heretoforein use. An electric iluid being passed through the wire, the core y magnetized and attract the vibrator. i

The great advantage of my apparatus is due with a winding- 2 @oase l I shall state my claims as follows:

1. Locating the armature or vibrator of an electro-magnet, together with the core, within the coils and concentrically therewith, subl stantiall yin the manner hereinbefore set forth.

2. In combination with au armature located Within the cylinder of the spool or coils, the horseshoe-magnet, so shaped that both of its ends are Within the cylinder of the spool or in line of its axis, substantially as set forth.

In testimony whereof I have signed my name to this specification before two subscribing Witmesses.

S. E. VAN CHOATE.

Witnesses:

A. PoLLoK, p EDM. F. BROWN. 

